What is the difference between deterministic and nondeterministic push down automata?

Pushdown automata are used in theories about what can be computed by machines. Deterministic pushdown automata can recognize all deterministic context-free languages while nondeterministic ones can recognize all context-free languages, with the former often used in parser design.

Is power of DPDA and Npda same?

As discussed above, every NPDA can’t be converted to DPDA. So, the power of NPDA and DPDA is not same.

What is the difference between DFA and PDA?

A pushdown automaton is a way to implement a context-free grammar in a similar way we design DFA for a regular grammar. A DFA can remember a finite amount of information, but a PDA can remember an infinite amount of information. a stack with infinite size.

How do you find DPDA?

A DPDA would need to know when to start removing letters from the stack. Thus an NPDA can recognise the language of the even palindromes, but a DPDA cannot. DPDAs recognise the regular languages and also some which are not regular, but not all of the context free languages.

Is Npda and DPDA equivalent example?

As we know that NPDA and DPDA are not equivalent in their power. NPDA can accept the context free languages but DPDA cannot.So, every language accepted by DPDA can also be accepteded by NPDA but vice versa is not true.

What is the difference between DPDA and Npda?

The main (and only) difference between DPDA and NPDA is that DPDAs are deterministic, whereas NPDAs are non-deterministic.

Can DPDA accept CFL?

A DPDA can accept languages like Lwcw that are not regular, but there are CFL (like Lwwr) that cannot be accepted by a DPDA. Theorem: If L is the language accepted by some DPDA P, then L has an unambiguous CFG. Example: Lwwr has an unambiguous grammar and it is not a DPDA language.

Which is more powerful Npda or DPDA?

Power of NPDA is more than DPDA. It is not possible to convert every NPDA to corresponding DPDA. The languages accepted by DPDA are called DCFL (Deterministic Context Free Languages) which are subset of NCFL (Non Deterministic CFL) accepted by NPDA.